Nut-lock.



Patented Apnl 18, 1905.

UNITED STATES. PATENT FFICE.

JOHN THOMAS CRENSHA\V, OF DERMO'l", rut-KANSAS.

NUT-LOCK- SPEOIFICATION forming part of Letters Paten N 787,834, dated April 18, 1905.

Application filed August 29, 1903- Serial No. 171,247.

Be it known that I, Jonx Tnmus (Janssuaw, a citizen of the United States, residing at l eru1ott, in thecounty of Ohicottand State of Arkansas, have invented a new and useful Nut-Lock, of which the following is a specilication.

This invention relates generally to nutlocks, and more particu arly to one designed for use upon railroml-rails and particularly adapted for use in connection with novel con structions of lish-plate and bolt, the object of the invention being to provide a nut-lock which will securely fasten the nut upon the bolt, said bolt being of such construction as to be securely locked in the fish-plates.

The invention consists also in the novel features of construction and combination of the various parts, all of which will be fully described hereinafter and pointed out in the claims.

ln the drawings forming part of this specilication, Figure 1 is a perspective view showing the practical application of my invention. Fig. 2 is a horizontal sectional view taken through the railroad-rail, fish-plates, nuts, and locks, the bolts being shown in elevation. Fig. I is a detail perspective view of the. lock.

Referring to the drawings, A indicates the meeting ends of two railroad-rails, and B and the fish-plates arranged upon opposite sides of the joint. The fish-plate B has tapered openings B, while the fish-plate C has threaded openings of uniform diameter, the pitch of the thread being substantially the same as the pitch of the thread of the opening B: but the threads are cut in reverse directions, one being a right-hand thread, while the other is a left-hand thread. The bolt l) is threaded at Any suitable construction of washer It is placed upon the bolt and rests against the lish-plate U, and the ordinary construction of nut F is then screwed lirmly upon the threaded end of the bolt, and the lockingplate (1? is then screwed down until the underbent end (wr engages the top of the nut. The opposite end of the locking-plate is then bent at a right angle and forced against the side of the nut until the rib h" engages the under side of the nut, thereby securely fastening the lock upon the nut, said locking-plate having a threaded opening i, so that the saidplate can be screwed upon the end of the bolt.

The manner of assembling the parts is as follows: The fish-plates B and 0 being placed in proper position, the threaded end I) of the bolt I) is passed through the threaded opening 13' of the lish-plate B, being of smaller diameter than any part of said opening, and is threaded into the opening C of the fish-plate C. The threads on the part D and of the opening B do not come into immediate en gagement, as the outer end portion of the opening B is of greater diameter than the diameter of the inner end portion of the conical threaded portion I); but as soon as the bolt reaches a position where the threads of the part I)" will engage those of the opening B further movement of the bolt is arrested, and owing to the opposite threading of the ends of the bolt it cannot be turned in eitherdirection. As soon as the. bolt 1) is in position the nut F and other parts can be placed in position in the usual manner.

Having thus fully described my invention, what I claim as new. and desire to secure by Letters Patent, is

1. The combination with lish-plates having reversely-threadcd openings, the openings in one fish-plate being tapered, of bolts having oppositely-threaded portions, the threaded portion adjacent the head being tapered. nuts and the locking-plates screwed upon the outer ends of the bolts, each locking-plate having one end bent under and adapted to engage the top of a nut, the opposite end of the plate having a rib adapted to engage the under side of adapted to be forced into engagement with the nut, substantially as described. the bottom sides of the nut, substantially as 2. The combination with the bolt and nut, described. of a locking-plate having-a threaded opening, JOHN THOMAS CRENSHAN.

' one end of the plate being bent under and W'itnesses:

adapted to engage the top of the nut, the op- \V. K. BAKER, posite end of the plate being provided With a 1 A. FLESOHNER. 

